99lightning

kooks and i had high flow cats on it and i kept the pulley ratio the same. and from the boost gauge that i could see i didnt lose any boost

e55amgrocket

So your going to tell me if you swap out 1 5/8 long tube headers with a 2.5'' exhaust system over to a 1 7/8 long tube headers with 4'' collectors and 3'' exhaust you will GAIN torque also if its tuned properly?

e55amgrocket

When i was thinking about getting the headers i read it had a 4'' collector in one of the threads.

DVC

You're right:

https://mbworld.org/forums/5165427-post1.html

I'm going to confirm with ARH. It's gotta be a typo.

99lightning

oh i was just saying for the e55 headers in general.

DVC

Thanks to BIP, we do have some data regarding 1 7/8" primaries vs 1 3/4" and their effect on the power curve.

Unfortunately this is N/A, as I couldn't find anything like this for the E55. Who knows...boost and tuning may change the results.

These are 2 different E63s..one with ARH, and the other with MBH. The car with MBH starts out with 20 more whp stock.

1 3/4:







1 7/8:

DVC

Thanks Tim. I'm still on stock manifolds with the KB @ 14PSI. I know I need to upgrade.

DVC

All,

I received confirmation from ARH that these are 3" collectors.

BI-Performance

Nice find

99lightning

ran 11.69 at 115.5 with a magnum powers and a 4lber stock block. get them headers and hang on.

Solo Man

Ordered my AR longtubes from Nick at AR yesterday!

Cant wait!

DVC

Damn. That's what I'm talking about!

Congratulations sir! Looking forward to your impressions.

Solo Man

Alright, I got the american racing headers installed this past Saturday. Quality was top notch as expected, Ive installed long tubes from AR on about a dozen cars previously (all Corvettes and one Ford Raptor) so I knew what to expect.

I am getting tuned by EC tonight so I haven't gotten to go WOT yet, but the sound is amazing so far.

However, I am having some issues with the drivers side fitment. The steering shaft is rubbing the header, particularly on left turns. I haven't had a chance to put it back on the lift, but when I get back from the Rolex 24hr this weekend I am sure its nothing that some heat and a pry bar cant fix. Other than the steering shaft rubbing, all else went well. Overall it took about 4 hours to complete the install with breaks in between and I will update everyone once I figure out the rubbing issue.

Zod

That's the thing...you drive an MB to be a capable daily driver. You should not be getting fitment issues and i would expect you not to get them on a system that costs a pretty penny. You are OK now, but it will get on your nerves. I know as i have gone through this with several systems...

I find solutions like...why don't you just bend a few parts of the under body, or a few header pipes, not to be a solution

where the hell is the test fitments and R&D prior to consumer sales

But thank you for sharing your experience and hope it all works out for you

Solo Man

I agree 100%, I've experienced this myself on past vehicles I've owned and I have remedied it. But, like you said this is a Mercedes and those headers did cost a good bit so I expected better.

DVC

Thank you for the update, Solo!

I know it's a pain, but I'm pretty sure that Anthony would get you a new DS header.

How is the ground clearance?

Solo Man

Ground clearance is fine, no problems there.

Tune is complete but I've got a check engine light, I'm going to scan it this weekend to see if its something that can be fixed in the tune.

cij911

Folks - I am having some custom headers installed (made by Benzworks in Huntington Beach, CA.)....The headers are a work of art (pics to follow) and are made of thick, high grade steel, have no fitment issues, and have been shown to add ~50 whp on the dyno (on cars with similar mods to mine).

I have NO IDEA, why Serge / Benzworks is NOT ADVERTISING these headers as they would be a great option for all looking for a true quality piece.

BlueML99

Is anyone going to make headers that have no fitment isues smh? Its like thats all I ever hear about w/ all the aftermarket heade companies smh. Its no fair to us as consumers. Let us know when this issue gets resolved. Good luck man.

ehaze

Did someone post the price?

jcjmw

100% agree. I still have my kleeman headers that I put on in 2005. I would love to put on LTH but everyone of those LTH that I searched has fitment or O2 related issues.

cij911

Not mine ....I will be posting pics early next week and doing a writeup on the headers Benzworks made for me...Awesome fit and awesome power. It should be no surprise as Benzworks has a stellar reputation in southern California.

I believe Benzworks will be starting a group buy as well. (They also have some really nice 2 piece brake options for folks too ...)

jcjmw

I hope so, that would be great!

DVC

Solo- any updates on the fitment issue? How does it drive?

305-E55

This past week I had these installed as well,I bought the setup used from another member here..It's the headers to hi flo cats then to stock resonators..
The good: Installation was pretty easy (as per my mechanic) The quality is good,sound is good (especially at WOT) They make good power (40rwhp)..
The bad:The fitment is not so good,the drivers side headers rub A LOT when turning left and accelerating..